Naslov
Folic acid in Rogoznica lake and in seawater in northern Adriatic , Croatia

Autori
Plavšić, Marta

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
International Conference on Lakes and Nutrient Loads / Spase Shumka et al. - Tirana : Agricultural University of Tirana, 2009, 182-186

ISBN
99956-47-04-4

Skup
International Conference "Lakes and Nutrient Loads" Alblakes09

Mjesto i datum
Pogradec, Albanija, 24.04.2009. - 26.04.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
folic acid; cathodic stripping voltammetry; Rogoznica lake; the Northern Adriatic

Sažetak
Folic acid has been determined by electrochemical method of cathodic stripping voltammetry. Folic acid (FA), belongs to B-group vitamins and has been recognized as possible nutrient for some phytoplankton species (a diatom Phaeodactylum tricornutum). The FA concentration was over the range of 0.1&#8211; 13.5 nM in the oxic part of Rogoznica Lake, and 0.1&#8211; 22 nM in the northern Adriatic. A weak but statistically significant correlation was established between photosynthetic pigment zeaxanthin, a characteristic biomarker of cyanobacteria, and FA in the oxic layer of the Rogoznica Lake (r2 = 0.3967 ; n = 29 ; P < 0.01), indicating cyanobacteria as a possible source of FA in this ecosystem. A statistically significant correlation (r2 = 0.36 ; n = 18 ; P < 0.01) between the two parameters was also found for the surface layer of the northern Adriatic (0 m). However, a low contribution of cyanobacteria to the total photosynthetic biomass in the northern Adriatic, and a lack of correlation between FA and zeaxanthin in the deeper layers of the water column, suggested that cyanobacteria were probably not the main source of FA in these waters. Due to the widespread use of FA it could pose a problem to enclosed coastal areas and lakes.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA